CN1734561A - Method with video head assembly and processing going barrel of rotary head cylinder - Google Patents
Method with video head assembly and processing going barrel of rotary head cylinder Download PDFInfo
- Publication number
- CN1734561A CN1734561A CNA2005100836635A CN200510083663A CN1734561A CN 1734561 A CN1734561 A CN 1734561A CN A2005100836635 A CNA2005100836635 A CN A2005100836635A CN 200510083663 A CN200510083663 A CN 200510083663A CN 1734561 A CN1734561 A CN 1734561A
- Authority
- CN
- China
- Prior art keywords
- magnetic head
- going barrel
- video
- interval trough
- head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007514 turning Methods 0.000 claims abstract description 23
- 238000003801 milling Methods 0.000 claims description 19
- 238000010079 rubber tapping Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 10
- 239000007767 bonding agent Substances 0.000 claims description 5
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 description 10
- 238000005520 cutting process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/60—Guiding record carrier
- G11B15/61—Guiding record carrier on drum, e.g. drum containing rotating heads
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/538—Disposition or mounting of pole pieces on rotating support
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/102—Manufacture of housing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/105—Mounting of head within housing or assembling of head and housing
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
A kind of video head assembly and a kind of method that is used to cut the rotary head cylinder of head drum.This video head assembly comprises: around the fixing fixedly drum of axle; With the going barrel that rotatably assembles around axle.Magnetic head unit is mounted to going barrel and has magnetic head.The magnetic head interval trough is formed on the bottom of going barrel along the circumferencial direction of going barrel, in fact to prevent magnetic head contact going barrel.At least one magnetic head window is connected with the magnetic head interval trough.Magnetic head highlights from the magnetic head window.Because the magnetic head interval trough forms along the circumferencial direction of the axle of going barrel, the magnetic head interval trough can be processed by turning.Therefore, can reduce to form going barrel required add number, thereby save manufacturing cost.
Description
Technical field
The present invention relates to a kind of magnetic recording and transcriber.More particularly, the method that the present invention relates to video head assembly and be used to process going barrel.
Background technology
Usually, the information of magnetic recording and transcriber recorded information and reproducing recorded in such as the recording medium of tape.Video video cassette recorder (VCR) and video camera are exactly the example of magnetic recording and transcriber.
This magnetic recording and transcriber comprise: a main engine bed; Rotatably be installed to main engine bed with video head assembly at magnetic recording and information reproduction; With the tape guiding device that is used to guide the tape operation.
This video head assembly rotatably is installed to main engine bed, and it is with respect to the main engine bed a certain special angle that tilts, to improve record and representational role.This video head assembly comprises: fixing drum; Going barrel; The drum lid; Axle; And magnetic head unit.Should fixing drum be fixed to that axle is gone up and going barrel rouses relative assembling to rotate with fixing on axle.This going barrel supports and is used to scan the magnetic head of operation tape with record and information reproduction.
Fig. 1 is the skeleton view that shows the going barrel 40 of video head assembly and be assembled to the magnetic head unit 70 on the going barrel 40.As shown in Figure 1, magnetic head unit 70 comprises head base 78 and magnetic head 72.This head base 78 has and is used for the head base fastener hole 86 that is connected with going barrel 40.Secure component 87 passes head base fastener hole 86 and is connected with the going barrel fastener hole 92 that forms on going barrel 40.
This going barrel 40 has the head slot 42 that is used to assemble magnetic head unit 70.This head slot 42 prevents contacting between magnetic head 72 and the going barrel 40.Magnetic head window 44 is formed on the excircle of head slot 42, is used for being communicated with head slot 42.This magnetic head 72 is outstanding from the excircle of going barrel 40 through head window 44, to write down and information reproduction at the tape (not shown).
With reference to accompanying drawing 2, the method that the going barrel 40 of above-mentioned structure is processed in traditional being used to will be described below.
Going barrel 40 is formed by pressure casting or casting (S1).After the pressure casting moulding, going barrel 40 is carried out cutting step.Usually, cutting is used such as the precision machine tool of computer numerical control (CNC) device (CNC) and is realized.Below, will describe cutting step in detail.
With reference to Fig. 2, process (S2) by first turning by the going barrel 40 that pressure casting forms.By first turning, form the side and the bottom surface of going barrel 40.Next be boring and tapping processing (S3).Boring has formed a plurality of holes in going barrel 40, and tapping forms screw thread on the hole that is formed by boring.When boring and tapping end, on uncut part during first turning, carry out second turning (S4), to form going barrel 40.Usually, cut in second turning top side.The actuating station milling is to form magnetic head window 44 (S5).After forming magnetic head window 44, head slot 42 is handled (S6) by end milling.At last, carry out the final precision turning of the size be used for accurately forming going barrel 40, thereby finish the cutting of going barrel 40.
Yet in end milling (S5 and S6), the instrument that is used to support the chuck (chuck) of going barrel to be processed and is used to handle going barrel is applied in very big load.This problem especially appears at during the end milling that is used to cut the head slot 42 with processing region wideer relatively than magnetic head window 44.Chuck in addition, is difficult to carry out Precision Machining owing to chuck can be moved by load because the load meeting is damaged.Therefore, need to reduce to process quantity and simplify the job operation of the video head assembly of processing (especially by reduce or eliminate the end milling step).
Therefore, need improvement video head assembly of making quickly and easily and simple, the economic method of making the improvement video head assembly.
Summary of the invention
Therefore, one aspect of the present invention is to provide: a kind of improvement video head assembly that comprises the rotary head drum of easy processing; With a kind of simple, economic method that is used to handle going barrel.
Video head assembly comprises: around the fixing fixedly drum of axle; Around a going barrel that rotatably assembles; Be assembled to going barrel and have the magnetic head unit of magnetic head; The magnetic head interval trough, its circumferencial direction along going barrel is formed on the bottom of going barrel, to prevent magnetic head contact going barrel in fact; With a plurality of magnetic head windows, it is communicated with the magnetic head interval trough, so that magnetic head is by its projection.Therefore, processing and reduction manufacturing cost have been simplified.
The magnetic head interval trough forms around the axle collar shape of going barrel.
A pair of magnetic head window can be provided with symmetrically.
Video head assembly also can comprise the horizontality adjusting parts of the horizontality that is used for the control head unit.Secure component is connected to head drum with magnetic head.Fastener hole is formed on the part place of the going barrel of contiguous magnetic head interval trough, to hold secure component.
A kind of method of processing going barrel may further comprise the steps: a) by the going barrel of turning through pressure casting or casting (die casting) formation, processing magnetic head interval trough; B) going barrel is holed and tapping; And c) end milling magnetic head window is so that magnetic head is outstanding from the excircle of going barrel.
Step a) comprises the steps: first turning, is used for contacting with going barrel to prevent magnetic head in fact at the side of going barrel processing magnetic head interval trough; With second turning, be used for after step b), processing for the second time going barrel.
According to foregoing, the quantity that can reduce to process, and simplify processing and handle.
In conjunction with the accompanying drawing of open the preferred embodiments of the present invention, by following detailed description, other purpose of the present invention, advantage and prominent feature will be more readily apparent from.
Description of drawings
By reference accompanying drawing detailed description exemplary embodiment, above-mentioned aspect of the present invention and further feature will be more obvious, wherein:
Fig. 1 is the skeleton view that schematically shows traditional going barrel;
Fig. 2 is the process flow diagram that shows the method for the going barrel that is used for manuscript 1;
Fig. 3 is the decomposition diagram that schematically shows according to the video head assembly of one exemplary embodiment of the present invention;
Fig. 4 is the partial sectional view along the straight line IV-IV of Fig. 3;
Fig. 5 is the process flow diagram of method of going barrel that is used to process video head assembly according to one exemplary embodiment of the present invention.
Among all figure, like numerals will will be considered to represent similar part, parts and structure.
Embodiment
Describe exemplary embodiment of the present invention in detail hereinafter with reference to accompanying drawing.
Illustrated content in description, for example detailed structure and parts only are used for auxiliary complete understanding the present invention.Therefore, clearly, the present invention also can realize under the situation that does not have these contents of determining.In addition, clear, simple and clear for making exemplary embodiment of the present invention, ignored the description of known function and structure.
With reference to Fig. 3 and Fig. 4, video head assembly comprises: be fixed to the fixedly drum 110 on the axle 100; Rotatably be assembled on the axle 100 to be arranged on the fixedly going barrel 140 of drum 110 tops; Cover 120 with the drum that is assemblied in going barrel 140 tops.
Should be fixedly drum 110 be fixed to and center on spools 100.This going barrel 140 is set at fixing drum 110 tops with going barrel 140 and the mode relative with fixing drum 110 is connected to axle 100.The bearing (not shown) is set between going barrel 140 and the axle 100.
Be fixed on fixedly drum 110 and bulging going barrel 140 high speed rotating that cover between 120 around axle 10.Going barrel 140 is supporting the magnetic head unit 170 of scanning operation tape (not shown) with record and the information of reproducing relevant tape (not shown).
Going barrel 140 has magnetic head window 144 in its bottom, is used for record and information reproduction so that magnetic head 172 exposes from the excircle of going barrel 140.A pair of magnetic head window 144 can be provided with symmetrically.Yet the quantity of magnetic head window 144 is unrestricted, and depends on the quantity of magnetic head 172.In addition, ring head interval trough 142 forms with magnetic head window 144 along the circumferencial direction of going barrel 140 with being connected.Magnetic head interval trough 142 has the degree of depth (referring to Fig. 4), to prevent magnetic head 172 and the bottom that is used for the bonding agent 180 that magnetic head 172 invests head base 178 is contacted going barrel 140 in fact.The magnetic head interval trough 142 that along the circumferential direction forms in current exemplary embodiment can carry out simple process by turning, and need not special-purpose end milling.Magnetic head interval trough 142 can have multiple shape, as long as it can along the circumferential direction be made by end milling.The magnetic head interval trough 142 of annular can be got rid of the traditional required end milling step of head slot 42 (Fig. 1) of processing.
The bottom of going barrel 140 disposes going barrel fastener hole 146 and the adjustment hole 150 with magnetic head interval trough 142 vicinities.Going barrel fastener hole 146 and adjustment hole 150 be by contiguous setting the mutually, and in the outside of magnetic head interval trough 142.Adjustment hole 150 is formed between magnetic head interval trough 142 and the going barrel fastener hole 146, and holds the horizontality adjusting parts 152 of the horizontality that is used for control head unit 170.Regulate parts 152 by the horizontality that is rotatably provided in the screw thread in the adjustment hole 150, the horizontality of magnetic head unit 170 can be controlled.At the opposite side place of going barrel fastener hole 146, be formed with a plurality of holes 154, the coil 174 that is used for being connected on the magnetic head 172 is connected to the rotation converter (not shown) that is assemblied in going barrel 140 tops.
This head base 178 has the head base fastener hole 186 that is used to be connected to going barrel 140.Fastener hole 146 and 186 has screw thread respectively, so that fastener hole 146 can be connected by the securing member such as screw 148 with 186, thereby head base 178 is installed on the going barrel 140.
Fig. 5 shows the method flow diagram be used to process according to the going barrel 140 of the video head assembly of one exemplary embodiment of the present invention.
With reference to Fig. 5, going barrel 140 is at first formed by pressure casting (S101).Utilization is such as the lathe of computer numerical control device (CNC), is cut (S102) through the going barrel 140 of pressure casting by first turning.First turning forms the sidepiece and the bottom of going barrel 140, and the magnetic head interval trough 142 in the bottom of formation going barrel 140.Boring and tapping processing (S103), wherein holing forms a plurality of holes in going barrel 140, and tapping forms screw thread in the hole that is formed by boring.Boring and tapping step are carried out by the lathe such as drilling machine.
When boring and tapping end, on unhewn part during first turning, carry out second turning (S104), with processing going barrel 140.Usually, the top side processes in second turning.After second turning, the actuating station milling is to form magnetic head window 144 (S105), so that magnetic head window 144 is connected to the magnetic head interval trough 142 that is formed by the first turning step.
Therefore, this end milling is easier than needing measurement length and the end milling step degree of depth, that be used to form traditional magnetic head window 44 (Fig. 1).When the end milling of magnetic head window 144 finishes, carry out the last precision turning (S106) of the precise measure of going barrel 140.
Correspondingly, reduce to be used for the number of times of the end milling processing of traditional head slot 42, and made things convenient for the processing of magnetic head window 144 to handle.
As understanding to the foregoing description of the going barrel 140 of video head assembly according to the preferred embodiment of the invention, owing to having the axle 100 around going barrel 140, the magnetic head interval trough 142 of annular formation along the circumferential direction, magnetic head 172 can prevent to contact going barrel 140 in fact with bonding agent 180.In addition, because turning can substitute end milling, required end milling can be omitted in the traditional head slot 42 of processing.
Therefore, manufacturing cost reduces, and can reduce the chuck that causes during the end milling of head slot 42 and the damage of other instrument.
Though illustrated and described the present invention with reference to specific embodiment, this area described technician can know: under the situation that does not deviate from the definite the spirit and scope of the present invention of claim, the present invention can carry out the change of various ways and details.
Claims (16)
1. video head assembly comprises:
Be fixed on the fixedly drum on the axle;
Be rotatably installed in the going barrel on the axle;
Be connected to going barrel and have the magnetic head unit of magnetic head;
The magnetic head interval trough, this magnetic head interval trough is formed on the going barrel to prevent magnetic head contact going barrel in fact in the circumference mode; With
At least one magnetic head window, this at least one magnetic head window is connected with the magnetic head interval trough, and magnetic head is outstanding by this at least one magnetic head window.
2. video head assembly according to claim 1, wherein:
The diameter of axle of magnetic head interval trough and going barrel is to spaced apart.
3. video head assembly according to claim 2, wherein:
The magnetic head window that a pair of diameter is relative is connected to the magnetic head interval trough.
4. video head assembly according to claim 2, wherein:
Horizontality is regulated parts and is arranged in the going barrel, is used for the horizontality of control head unit.
5. video head assembly according to claim 4, wherein:
Secure component is connected to going barrel with magnetic head.
6. video head assembly according to claim 5, wherein:
The contiguous magnetic head interval trough of fastener hole is formed in the going barrel, and is fit to hold secure component.
7. video head assembly according to claim 6, wherein:
Horizontality is regulated parts and is set in the going barrel between the magnetic head interval trough and securing member.
8. video head assembly according to claim 1, wherein:
Magnetic head and magnetic head unit are whole to be formed.
9. video head assembly according to claim 1, wherein:
Magnetic head uses bonding agent to be fixed to magnetic head unit.
10. video head assembly according to claim 3, wherein:
The magnetic head unit that a pair of diameter is relative is connected to going barrel, and the magnetic head of described a pair of magnetic head unit is outstanding from the relative magnetic head window of diameter.
11. a method of processing video head assembly may further comprise the steps:
By the going barrel of turning, form the magnetic head interval trough through pressure casting or casting formation;
Going barrel is holed and tapping; With
End mill pin magnetic head window is so that magnetic head is outstanding from the excircle of going barrel.
12. method according to claim 11 also comprises:
First turning is used for contacting with going barrel to prevent magnetic head in fact at the side of going barrel processing magnetic head interval trough;
13. method according to claim 12 also comprises:
Second turning is used for secondary processing going barrel after to going barrel boring and tapping.
14. device according to claim 11 further comprises:
The magnetic head unit that will have the magnetic head that is connected thereto is fixed to going barrel, contacts with magnetic head to prevent going barrel in fact.
15. method according to claim 11, wherein:
Boring and the tapping step also comprises the adjustment hole in the going barrel and fastener hole is holed and tapping.
16. method according to claim 11, wherein:
End milling also comprises a pair of relative magnetic head window of diameter that is connected to the magnetic head interval trough of end milling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040061338A KR20060012719A (en) | 2004-08-04 | 2004-08-04 | A head drum assembly with a rotational drum and a method for cutting the rotational drum |
| KR200461338 | 2004-08-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1734561A true CN1734561A (en) | 2006-02-15 |
| CN100380451C CN100380451C (en) | 2008-04-09 |
Family
ID=36076942
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100836635A Expired - Fee Related CN100380451C (en) | 2004-08-04 | 2005-07-12 | Head drum assembly having a rotary head drum and a method for processing a rotary drum |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20060028769A1 (en) |
| EP (1) | EP1624449A3 (en) |
| JP (1) | JP4036875B2 (en) |
| KR (1) | KR20060012719A (en) |
| CN (1) | CN100380451C (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US161075A (en) * | 1875-03-23 | Improvement in paper barrels | ||
| JPS59162617A (en) * | 1983-03-07 | 1984-09-13 | Sharp Corp | Rotary magnetic head device |
| JPH0346114A (en) * | 1989-07-13 | 1991-02-27 | Canon Inc | Magnetic recording and reproducing device |
| JP2953048B2 (en) * | 1990-11-26 | 1999-09-27 | 松下電器産業株式会社 | Rotary head device for magnetic recording / reproducing device |
| KR0138510B1 (en) * | 1990-12-19 | 1998-06-01 | 아오이 죠이치 | Magnetic head and head apparatus |
| JPH052725A (en) * | 1991-06-27 | 1993-01-08 | Sony Corp | Rotary head drum device |
| JPH05314602A (en) * | 1992-05-08 | 1993-11-26 | Nec Corp | Rotary drum |
| CN1031534C (en) * | 1992-06-12 | 1996-04-10 | 阿尔波斯电气株式会社 | Rotative magnetic head |
| KR200153814Y1 (en) * | 1994-12-27 | 1999-08-02 | 전주범 | Head mounting structure for a head drum assembly |
| CN1163448A (en) * | 1996-03-19 | 1997-10-29 | 三星电子株式会社 | Magnetic head drum |
| KR100215417B1 (en) * | 1997-03-26 | 1999-08-16 | 전주범 | Structure for setting head base in vcr |
-
2004
- 2004-08-04 KR KR1020040061338A patent/KR20060012719A/en not_active Application Discontinuation
-
2005
- 2005-06-27 US US11/166,177 patent/US20060028769A1/en not_active Abandoned
- 2005-07-12 CN CNB2005100836635A patent/CN100380451C/en not_active Expired - Fee Related
- 2005-07-25 JP JP2005215000A patent/JP4036875B2/en not_active Expired - Fee Related
- 2005-08-03 EP EP05107163A patent/EP1624449A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| JP2006048909A (en) | 2006-02-16 |
| CN100380451C (en) | 2008-04-09 |
| JP4036875B2 (en) | 2008-01-23 |
| EP1624449A2 (en) | 2006-02-08 |
| KR20060012719A (en) | 2006-02-09 |
| EP1624449A3 (en) | 2007-11-14 |
| US20060028769A1 (en) | 2006-02-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080409 |